Spatiotemporally controlled room-temperature exciton transport under dynamic strain

Two-dimensional transition metal dichalcogenides (TMDs) provide an attractive platform for studying strain dependent exciton transport at room temperature due to large binding energy and strong bandgap sensitivity mechanical stimuli. Here, we use Rayleigh type surface acoustic wave (SAW) demonstrate controlled directional under weak coupling regime temperature. We screen the in-plane piezoelectric field using photogenerated carriers study type-I modulation measure a maximum drift velocity of 600 m/s. Furthermore, precise steering flux by controlling relative phase between input RF excitation photogeneration. The results important insight into dynamic excitons in 2D semiconductor system pave way exciting applications excitonic devices data communication processing, sensing conversion.